Table 1.

Blood haematocrit (Hct), haemoglobin (Hb), mean cellular haemoglobin content (MCHC), haemoglobin modulators, RBC intracellular pH and Hb isoforms from sculpins. (Data are means±s.e. Hct is presented in %, Hb in mM, MCHC in [Hb]/Hct, [ATP] and [GTP] are presented relative to [Hb]. pHi represents RBC intracellular pH, Hb isoforms represent total number of isoforms, anodic represents the number of anodic Hb isoforms and cathodic represents the number of cathodic Hb isoforms. Numbers in brackets indicate sample size. A representative from each species was used to determine the total number of Hb isoforms, as well as the number of cathodic and anodic isoforms.)

	O. maculosus	C. globiceps	O. snyderi	E. bison	A. fenestralis	A. lateralis	L. armatus	S. marmoratus	B. cirrhosus	M. scorpius	C. asper
Hct	35±2 (8)	35±1 (8)	37±3 (8)	22±2 (8)	27±2 (8)	24±2 (4)	11±1 (8)	23±1 (8)	29±1 (8)	25±2 (8)	27±2 (8)
Hb	1.3±0.1 (5)	1.3+0.1 (6)	1.3+0.1 (3)	0.6±0.1 (7)	0.9±0.1 (8)	0.9±0.1 (4)	0.1±0.1 (8)	0.8±0.1 (16)	0.7±0.1 (6)	0.7±0.1 (6)	0.8±0.1 (15)
MCHC	3.7±0.2 (3)	3.4±0.3 (2)	3.2±0.7 (2)	2.5±0.2 (7)	3.5±0.2 (8)	3.5±0.4 (4)	1.3±0.2 (7)	2.8±0.1 (15)	2.7±0.1 (14)	2.7±0.2 (6)	3.0±0.1 (15)
ATP/Hb	1.82±0.18 (8)	2.43±0.09 (8)	2.18±0.06 (3)	0.04±0.01 (6)	0.91±0.06 (8)	1.44±0.09 (3)	1.47±0.13 (8)	0.01±0.01 (7)	1.38±0.04 (3)	0.69±0.13 (6)	1.04±0.17 (8)
GTP/Hb	0.25±0.06 (8)	0.51±0.03 (8)	0.10±0.01 (3)	0.28±0.08 (6)	2.33±0.16 (8)	0.40±0.07 (3)	0.33±0.05 (8)	0.02±0.01 (7)	0.18±0.02 (3)	0.22±0.03 (6)	0.19±0.04 (8)
pHi	7.35±0.03 (12)	7.26±0.05 (2)	7.26±0.02 (7)	7.27	7.32±0.04 (6)	7.30±0.06 (4)	7.29±0.02 (8)	7.18	7.42±0.02 (12)	N/A	7.28±0.01 (8)
total isoforms	4	9	4	9	9	10	5	4	8	3	10
anodic	4	6	3	8	6	7	5	4	8	3	9
cathodic	0	3	1	1	3	3	0	0	0	0	1